Why do they say not to put a car battery on a concrete floor? |
- Why do they say not to put a car battery on a concrete floor?
- If your visual cortex is damaged, can you see in your dreams?
- Why does staring at a moving optical illusion and looking away cause what you're looking at to appear to be moving?
- How do radio waves (low energy) travel through walls and gamma rays (high energy) travel through walls, but visible light (medium energy) can't go through walls?
- What do all the numbers and letters mean in celestial bodies? i.e. APM 08279+5255 [Super massive black hole]
- Why are some metals stronger than others?
- Is there any evidence to suggest that plant yields are lower in microgravity?
- Hi all. I have seen it stated as fact by those who don't believe in man made climate change that more damage is done by the explosion of one volcano than by all the harmful chemicals released by China in an entire year. Is this myth?
- How do electric and magnetic multipole operators transform under Lorentz boosts?
- Are there any opaque, liquid solutions that become transparent or at least translucent when agitated?
- If has been said of Artificial cranial deformation, which was notably practiced by the Incas of Peru, that it might have resulted in pain and possibly psychiatric issues. To what degree, and on what basis, is that established fact?
- [biology] [reproduction] Can/does a successful and healthy pregnancy affect fertility for a woman?
- Where does the excess energy gained from fission and fusion come from?
- What would happen to metals left in water for exceedingly long amounts of time?
- How to calculate fridge efficiency rating? (EU scale)
- What would happen if you didn't use the restroom, forcing yourself to hold in your waste for an extended period of time?
- How to compute probability distribution function of measurements?
- When a wireman climbs a radio tower etc... are there any maleffects from waves?
- If the pressure from stars fuses hydrogen into heavier and heavier elements, then why were the first hydrogen atoms not fused together shortly after the big bang when they were still very close together and under immense pressure?
- In the context of computer networking, how are 0 bits transmitted and subsequently detected?
- How do neuron action potentials create different information?
- What determines a fluid's boiling point?
- In feynman diagrams, why are positrons viewed as moving backwards through time? How is this a more useful model?
| Why do they say not to put a car battery on a concrete floor? Posted: 23 Jan 2017 11:14 PM PST The old wive's tale has been proven anecdotally that putting a car battery on a concrete floor kills the charge. Is there any science behind this or is it coincidental? [link] [comments]  |
| If your visual cortex is damaged, can you see in your dreams? Posted: 23 Jan 2017 07:10 PM PST Particularly, can a patient in a coma dream if the auditory or visual cortex is damaged? [link] [comments]  |
| Posted: 23 Jan 2017 10:11 PM PST |
| Posted: 23 Jan 2017 04:29 PM PST It just seems strange that I can send a text when indoors, but the walls block light which has more energy. [link] [comments]  |
| Posted: 23 Jan 2017 07:41 PM PST |
| Why are some metals stronger than others? Posted: 23 Jan 2017 11:02 PM PST |
| Is there any evidence to suggest that plant yields are lower in microgravity? Posted: 23 Jan 2017 06:53 PM PST I've been doing some cursory research into plant growth in space and cannot seem to get an answer to this question. There is an abundance of papers on whether plants can grow at all in space (they can), but very little on how microgravity actually affects their yields per unit of growing area. I suppose another way of looking at it would be how plant growth in whatever medium they're using compares to conventional hydroponics or aquaponics. The overarching question I am trying to answer is whether it is worth implementing some form of artificial gravity for future plant growth habitats. Thanks in advance for any help! [link] [comments]  |
| Posted: 24 Jan 2017 03:49 AM PST To me it seems impossible as it would totally undermine the idea that humans can significantly effect climate change, although I can find no actual data to back up what is, in my experience, a fairly common argument. [link] [comments]  |
| How do electric and magnetic multipole operators transform under Lorentz boosts? Posted: 23 Jan 2017 05:14 PM PST We learn electric and magnetic fields are simply frame-dependent phenomena (e.g. if moving with charge then one only observes a magnetic field). Is there an analog with the dipole operators? If we were in another frame, would this magnetic dipole operator appear to be an electric dipole operator? Since electric dipole operators change parity, would an electric dipole operator appear to change parity in one frame and not the other? The monopole case (i.e. a charge) is Lorentz-invariant, but what about multipoles in general? [link] [comments]  |
| Posted: 23 Jan 2017 04:24 PM PST Like, you could use it to make a reverse snow-globe that would reveal the scene when you picked it up and shook it. [link] [comments]  |
| Posted: 24 Jan 2017 05:14 AM PST I'm referring to practices such as displayed on the Paracas skulls and some Maya. I'm supposing it is not being practiced anymore, but I do not know so for a fact. Anything else we know about this practice and its effects is fair game. [link] [comments]  |
| [biology] [reproduction] Can/does a successful and healthy pregnancy affect fertility for a woman? Posted: 23 Jan 2017 07:43 PM PST In my case, after my first child, my menstrual cycles were actually lighter, shorter, and less painful. I'm wondering if there's any bearing on fertility after a healthy pregnancy, like the body "recognizes" that it's done this before and can work better at doing it again? I searched online, but all the info I found was on factors affecting infertility. [link] [comments]  |
| Where does the excess energy gained from fission and fusion come from? Posted: 23 Jan 2017 03:26 PM PST Every visualization of fission and fusion just shows excess energy flying away after the reaction, but where does that energy come from. On fusion, i read that the low binding energy per nucleon enables you to realese energy, but how and why? Also, i sometimes hear that the bonds, both atomic and chemical, doesn't hold energy, instead, you realese energy when you put things together, whats up with that? I thought that bonds was holding stored energy? [link] [comments]  |
| What would happen to metals left in water for exceedingly long amounts of time? Posted: 24 Jan 2017 06:45 AM PST For example, say you left a piece of steel or iron for 100 days or even a few years, what would happen to it by the time you came back for it? And, would different metals exprience the same reaction or lackthereof? [link] [comments]  |
| How to calculate fridge efficiency rating? (EU scale) Posted: 23 Jan 2017 06:08 PM PST Hey guys. I'm looking to find out how to calculate the efficiency rating for a fridge (European Union scale). I know the capacity of the fridge, and the kWh consumption in a week of standard use. Long story short, I'm living in a rented apartment and I noticed the fridge had the compressor running very often (fridge was included in the apartment). Then I looked at the label and noticed it says "Made in West Germany". That seemed odd, it's not everyday you run into an appliance that's probably older than you. I bought one of those energy consumption meters and measured the weekly consumption during a week of standard use, and multiplied by 52 to obtain the consumption per annum. Turns out this tiny old 164L fridge has a yearly consumption of 842.4 kWh (16.2 weekly). Considering how energy expenses are not included in the rent, I feel compelled to bring this up with the land lord, and I'd like to have a rough idea of where in the efficiency scale this fridge would fit. Thank you. [link] [comments]  |
| Posted: 23 Jan 2017 04:34 PM PST |
| How to compute probability distribution function of measurements? Posted: 23 Jan 2017 03:24 PM PST I have a set of wave heights for ~20 years in monthly averages and I need to find the probability distribution function, could someone guide me with some steps to do that? Thanks in advance! [link] [comments]  |
| When a wireman climbs a radio tower etc... are there any maleffects from waves? Posted: 23 Jan 2017 11:26 PM PST |
| Posted: 23 Jan 2017 12:51 PM PST |
| In the context of computer networking, how are 0 bits transmitted and subsequently detected? Posted: 23 Jan 2017 07:32 PM PST Say for example I have a router that is transmitting a network message over a fiber optic cable. As I understand it, the router will transmit this message as a series of bits represented by light pulses. I assume a 1 bit (representing an "on" state) would be sent as a light pulse, but in this case how would a 0 bit be sent? Also how would the network device on the other end confirm that it has received a 0 bit? [link] [comments]  |
| How do neuron action potentials create different information? Posted: 23 Jan 2017 05:52 PM PST Basically, every action potential really is just the influx and exit of Na+ and K+ ions, right? And then they'll release neurotransmitters which just make it more or less likely to fire. So my question is: How does the brain treat a neuron action potential from the ears different from one from the eyes? And if neurotransmitters only increase or decrease the likelihood of an action potential, then why not just name them "excitatory" or "inhibitory"? Why does the brain SEE from one AP, but HEAR from another if it's really just the same information? If I were to somehow reroute neurons from my auditory sense and make them connect to the vision area of my brain, would I "see" when I am actually "hearing"? [link] [comments]  |
| What determines a fluid's boiling point? Posted: 23 Jan 2017 02:30 PM PST I was recently looking over temperatures at which gases become liquids, and noticed that helium boils at -452 degrees Fahrenheit, while hydrogen boils at -423 degrees Fahrenheit. What determines these temperatures? Is it atomic/molecular structure? [link] [comments]  |
| Posted: 23 Jan 2017 10:16 AM PST How is this possibly more useful than a positron moving forward in time? [link] [comments]  |
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